Why can't I move the Bones?
First you need to see bones. Go to properties pane, select the object (the cube icon) and find x-Ray and switch on that field. After that you see armature, and you can select one of the bones from the armature. 

Second, go to properties pane, click on the human icon (data) and select pose position.   Rest position is for edit bones, pose position is for animation.